* [PATCH v3 0/9] ARM: mstar: cpupll
@ 2022-01-21 19:35 ` Romain Perier
0 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel
This series adds a basic driver for the PLL that generates
the cpu clock on MStar/SigmaStar ARMv7 SoCs.
Unfortunately there isn't much documentation for this thing
so there are few magic values and guesses.
This needs to come after the MPLL DT changes.
Changes since v2:
- Re-ordered Kconfig by name
- Re-ordered includes alphabetically and removed useless ones
- Used timeout for cpu_relax
- Returned DIV_ROUND_DOWN_ULL() directly in
msc313_cpupll_frequencyforreg()
- Returned DIV_ROUND_DOWN_ULL() directly in
msc313_cpupll_regforfrequecy()
- Reduced the number of lines for msc313_cpupll_of_match
- Removed CLK_IS_CRITICAL
Changes since v1:
- Re-worked the series and ensure that 'make dt_binding_check' passes.
The required commit is merged now, so it is okay.
- Fixed coding style issues in the driver and makes check_patch.pl happy
- Added one more commit for extending the opp_table for infinity2m.
Daniel Palmer (8):
dt-bindings: clk: mstar msc313 cpupll binding description
clk: mstar: msc313 cpupll clk driver
ARM: mstar: Add cpupll to base dtsi
ARM: mstar: Link cpupll to cpu
ARM: mstar: Link cpupll to second core
ARM: mstar: Add OPP table for infinity
ARM: mstar: Add OPP table for infinity3
ARM: mstar: Add OPP table for mercury5
Romain Perier (1):
ARM: mstar: Extend opp_table for infinity2m
.../bindings/clock/mstar,msc313-cpupll.yaml | 45 ++++
arch/arm/boot/dts/mstar-infinity.dtsi | 34 +++
arch/arm/boot/dts/mstar-infinity2m.dtsi | 17 ++
arch/arm/boot/dts/mstar-infinity3.dtsi | 58 +++++
arch/arm/boot/dts/mstar-mercury5.dtsi | 36 +++
arch/arm/boot/dts/mstar-v7.dtsi | 9 +
drivers/clk/mstar/Kconfig | 8 +
drivers/clk/mstar/Makefile | 2 +-
drivers/clk/mstar/clk-msc313-cpupll.c | 221 ++++++++++++++++++
9 files changed, 429 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/clock/mstar,msc313-cpupll.yaml
create mode 100644 drivers/clk/mstar/clk-msc313-cpupll.c
--
2.34.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 24+ messages in thread
* [PATCH v3 1/9] dt-bindings: clk: mstar msc313 cpupll binding description
2022-01-21 19:35 ` Romain Perier
@ 2022-01-21 19:35 ` Romain Perier
-1 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel, Rob Herring
From: Daniel Palmer <daniel@0x0f.com>
Add a binding description for the MStar/SigmaStar CPU PLL block.
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
.../bindings/clock/mstar,msc313-cpupll.yaml | 45 +++++++++++++++++++
1 file changed, 45 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/mstar,msc313-cpupll.yaml
diff --git a/Documentation/devicetree/bindings/clock/mstar,msc313-cpupll.yaml b/Documentation/devicetree/bindings/clock/mstar,msc313-cpupll.yaml
new file mode 100644
index 000000000000..a9ad7ab5230c
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/mstar,msc313-cpupll.yaml
@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/mstar,msc313-cpupll.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MStar/Sigmastar MSC313 CPU PLL
+
+maintainers:
+ - Daniel Palmer <daniel@thingy.jp>
+
+description: |
+ The MStar/SigmaStar MSC313 and later ARMv7 chips have a scalable
+ PLL that can be used as the clock source for the CPU(s).
+
+properties:
+ compatible:
+ const: mstar,msc313-cpupll
+
+ "#clock-cells":
+ const: 1
+
+ clocks:
+ maxItems: 1
+
+ reg:
+ maxItems: 1
+
+required:
+ - compatible
+ - "#clock-cells"
+ - clocks
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/mstar-msc313-mpll.h>
+ cpupll: cpupll@206400 {
+ compatible = "mstar,msc313-cpupll";
+ reg = <0x206400 0x200>;
+ #clock-cells = <1>;
+ clocks = <&mpll MSTAR_MSC313_MPLL_DIV2>;
+ };
--
2.34.1
^ permalink raw reply related [flat|nested] 24+ messages in thread* [PATCH v3 1/9] dt-bindings: clk: mstar msc313 cpupll binding description
@ 2022-01-21 19:35 ` Romain Perier
0 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel, Rob Herring
From: Daniel Palmer <daniel@0x0f.com>
Add a binding description for the MStar/SigmaStar CPU PLL block.
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
.../bindings/clock/mstar,msc313-cpupll.yaml | 45 +++++++++++++++++++
1 file changed, 45 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/mstar,msc313-cpupll.yaml
diff --git a/Documentation/devicetree/bindings/clock/mstar,msc313-cpupll.yaml b/Documentation/devicetree/bindings/clock/mstar,msc313-cpupll.yaml
new file mode 100644
index 000000000000..a9ad7ab5230c
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/mstar,msc313-cpupll.yaml
@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/mstar,msc313-cpupll.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MStar/Sigmastar MSC313 CPU PLL
+
+maintainers:
+ - Daniel Palmer <daniel@thingy.jp>
+
+description: |
+ The MStar/SigmaStar MSC313 and later ARMv7 chips have a scalable
+ PLL that can be used as the clock source for the CPU(s).
+
+properties:
+ compatible:
+ const: mstar,msc313-cpupll
+
+ "#clock-cells":
+ const: 1
+
+ clocks:
+ maxItems: 1
+
+ reg:
+ maxItems: 1
+
+required:
+ - compatible
+ - "#clock-cells"
+ - clocks
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/mstar-msc313-mpll.h>
+ cpupll: cpupll@206400 {
+ compatible = "mstar,msc313-cpupll";
+ reg = <0x206400 0x200>;
+ #clock-cells = <1>;
+ clocks = <&mpll MSTAR_MSC313_MPLL_DIV2>;
+ };
--
2.34.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 24+ messages in thread
* [PATCH v3 2/9] clk: mstar: msc313 cpupll clk driver
2022-01-21 19:35 ` Romain Perier
@ 2022-01-21 19:35 ` Romain Perier
-1 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel, Willy Tarreau
From: Daniel Palmer <daniel@0x0f.com>
Add a driver for the CPU pll/ARM pll/MIPS pll that is present
in MStar SoCs.
Currently there is no documentation for this block so it's possible
this driver isn't entirely correct.
Only tested on the version of this IP in the MStar/SigmaStar
ARMv7 SoCs.
Co-authored-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
---
drivers/clk/mstar/Kconfig | 8 +
drivers/clk/mstar/Makefile | 2 +-
drivers/clk/mstar/clk-msc313-cpupll.c | 221 ++++++++++++++++++++++++++
3 files changed, 230 insertions(+), 1 deletion(-)
create mode 100644 drivers/clk/mstar/clk-msc313-cpupll.c
diff --git a/drivers/clk/mstar/Kconfig b/drivers/clk/mstar/Kconfig
index de37e1bce2d2..146eeb637318 100644
--- a/drivers/clk/mstar/Kconfig
+++ b/drivers/clk/mstar/Kconfig
@@ -1,4 +1,11 @@
# SPDX-License-Identifier: GPL-2.0-only
+config MSTAR_MSC313_CPUPLL
+ bool "MStar CPUPLL driver"
+ depends on ARCH_MSTARV7 || COMPILE_TEST
+ default ARCH_MSTARV7
+ help
+ Support for the CPU PLL present on MStar/Sigmastar SoCs.
+
config MSTAR_MSC313_MPLL
bool "MStar MPLL driver"
depends on ARCH_MSTARV7 || COMPILE_TEST
@@ -7,3 +14,4 @@ config MSTAR_MSC313_MPLL
help
Support for the MPLL PLL and dividers block present on
MStar/Sigmastar SoCs.
+
diff --git a/drivers/clk/mstar/Makefile b/drivers/clk/mstar/Makefile
index f8dcd25ede1d..21296a04e65a 100644
--- a/drivers/clk/mstar/Makefile
+++ b/drivers/clk/mstar/Makefile
@@ -2,5 +2,5 @@
#
# Makefile for mstar specific clk
#
-
+obj-$(CONFIG_MSTAR_MSC313_CPUPLL) += clk-msc313-cpupll.o
obj-$(CONFIG_MSTAR_MSC313_MPLL) += clk-msc313-mpll.o
diff --git a/drivers/clk/mstar/clk-msc313-cpupll.c b/drivers/clk/mstar/clk-msc313-cpupll.c
new file mode 100644
index 000000000000..c57b509e8c20
--- /dev/null
+++ b/drivers/clk/mstar/clk-msc313-cpupll.c
@@ -0,0 +1,221 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 Daniel Palmer <daniel@thingy.jp>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+
+/*
+ * This IP is not documented outside of the messy vendor driver.
+ * Below is what we think the registers look like based on looking at
+ * the vendor code and poking at the hardware:
+ *
+ * 0x140 -- LPF low. Seems to store one half of the clock transition
+ * 0x144 /
+ * 0x148 -- LPF high. Seems to store one half of the clock transition
+ * 0x14c /
+ * 0x150 -- vendor code says "toggle lpf enable"
+ * 0x154 -- mu?
+ * 0x15c -- lpf_update_count?
+ * 0x160 -- vendor code says "switch to LPF". Clock source config? Register bank?
+ * 0x164 -- vendor code says "from low to high" which seems to mean transition from LPF low to
+ * LPF high.
+ * 0x174 -- Seems to be the PLL lock status bit
+ * 0x180 -- Seems to be the current frequency, this might need to be populated by software?
+ * 0x184 / The vendor driver uses these to set the initial value of LPF low
+ *
+ * Frequency seems to be calculated like this:
+ * (parent clock (432mhz) / register_magic_value) * 16 * 524288
+ * Only the lower 24 bits of the resulting value will be used. In addition, the
+ * PLL doesn't seem to be able to lock on frequencies lower than 220 MHz, as
+ * divisor 0xfb586f (220 MHz) works but 0xfb7fff locks up.
+ *
+ * Vendor values:
+ * frequency - register value
+ *
+ * 400000000 - 0x0067AE14
+ * 600000000 - 0x00451EB8,
+ * 800000000 - 0x0033D70A,
+ * 1000000000 - 0x002978d4,
+ */
+
+#define REG_LPF_LOW_L 0x140
+#define REG_LPF_LOW_H 0x144
+#define REG_LPF_HIGH_BOTTOM 0x148
+#define REG_LPF_HIGH_TOP 0x14c
+#define REG_LPF_TOGGLE 0x150
+#define REG_LPF_MYSTERYTWO 0x154
+#define REG_LPF_UPDATE_COUNT 0x15c
+#define REG_LPF_MYSTERYONE 0x160
+#define REG_LPF_TRANSITIONCTRL 0x164
+#define REG_LPF_LOCK 0x174
+#define REG_CURRENT 0x180
+
+#define LPF_LOCK_TIMEOUT 100000000
+
+#define MULTIPLIER_1 16
+#define MULTIPLIER_2 524288
+#define MULTIPLIER (MULTIPLIER_1 * MULTIPLIER_2)
+
+struct msc313_cpupll {
+ void __iomem *base;
+ struct clk_hw clk_hw;
+};
+
+#define to_cpupll(_hw) container_of(_hw, struct msc313_cpupll, clk_hw)
+
+static u32 msc313_cpupll_reg_read32(struct msc313_cpupll *cpupll, unsigned int reg)
+{
+ u32 value;
+
+ value = ioread16(cpupll->base + reg + 4) << 16;
+ value |= ioread16(cpupll->base + reg);
+
+ return value;
+}
+
+static void msc313_cpupll_reg_write32(struct msc313_cpupll *cpupll, unsigned int reg, u32 value)
+{
+ u16 l = value & 0xffff, h = (value >> 16) & 0xffff;
+
+ iowrite16(l, cpupll->base + reg);
+ iowrite16(h, cpupll->base + reg + 4);
+}
+
+static void msc313_cpupll_setfreq(struct msc313_cpupll *cpupll, u32 regvalue)
+{
+ ktime_t timeout;
+
+ msc313_cpupll_reg_write32(cpupll, REG_LPF_HIGH_BOTTOM, regvalue);
+
+ iowrite16(0x1, cpupll->base + REG_LPF_MYSTERYONE);
+ iowrite16(0x6, cpupll->base + REG_LPF_MYSTERYTWO);
+ iowrite16(0x8, cpupll->base + REG_LPF_UPDATE_COUNT);
+ iowrite16(BIT(12), cpupll->base + REG_LPF_TRANSITIONCTRL);
+
+ iowrite16(0, cpupll->base + REG_LPF_TOGGLE);
+ iowrite16(1, cpupll->base + REG_LPF_TOGGLE);
+
+ timeout = ktime_add_ns(ktime_get(), LPF_LOCK_TIMEOUT);
+ while (!(ioread16(cpupll->base + REG_LPF_LOCK))) {
+ if (ktime_after(ktime_get(), timeout)) {
+ pr_err("timeout waiting for LPF_LOCK\n");
+ return;
+ }
+ cpu_relax();
+ }
+
+ iowrite16(0, cpupll->base + REG_LPF_TOGGLE);
+
+ msc313_cpupll_reg_write32(cpupll, REG_LPF_LOW_L, regvalue);
+}
+
+static unsigned long msc313_cpupll_frequencyforreg(u32 reg, unsigned long parent_rate)
+{
+ unsigned long long prescaled = ((unsigned long long)parent_rate) * MULTIPLIER;
+
+ if (prescaled == 0 || reg == 0)
+ return 0;
+ return DIV_ROUND_DOWN_ULL(prescaled, reg);
+}
+
+static u32 msc313_cpupll_regforfrequecy(unsigned long rate, unsigned long parent_rate)
+{
+ unsigned long long prescaled = ((unsigned long long)parent_rate) * MULTIPLIER;
+
+ if (prescaled == 0 || rate == 0)
+ return 0;
+ return DIV_ROUND_UP_ULL(prescaled, rate);
+}
+
+static unsigned long msc313_cpupll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
+{
+ struct msc313_cpupll *cpupll = to_cpupll(hw);
+
+ return msc313_cpupll_frequencyforreg(msc313_cpupll_reg_read32(cpupll, REG_LPF_LOW_L),
+ parent_rate);
+}
+
+static long msc313_cpupll_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ u32 reg = msc313_cpupll_regforfrequecy(rate, *parent_rate);
+ long rounded = msc313_cpupll_frequencyforreg(reg, *parent_rate);
+
+ /*
+ * This is my poor attempt at making sure the resulting
+ * rate doesn't overshoot the requested rate.
+ */
+ for (; rounded >= rate && reg > 0; reg--)
+ rounded = msc313_cpupll_frequencyforreg(reg, *parent_rate);
+
+ return rounded;
+}
+
+static int msc313_cpupll_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long parent_rate)
+{
+ struct msc313_cpupll *cpupll = to_cpupll(hw);
+ u32 reg = msc313_cpupll_regforfrequecy(rate, parent_rate);
+
+ msc313_cpupll_setfreq(cpupll, reg);
+
+ return 0;
+}
+
+static const struct clk_ops msc313_cpupll_ops = {
+ .recalc_rate = msc313_cpupll_recalc_rate,
+ .round_rate = msc313_cpupll_round_rate,
+ .set_rate = msc313_cpupll_set_rate,
+};
+
+static const struct of_device_id msc313_cpupll_of_match[] = {
+ { .compatible = "mstar,msc313-cpupll" },
+ {}
+};
+
+static const struct clk_parent_data cpupll_parent = {
+ .index = 0,
+};
+
+static int msc313_cpupll_probe(struct platform_device *pdev)
+{
+ struct clk_init_data clk_init = {};
+ struct device *dev = &pdev->dev;
+ struct msc313_cpupll *cpupll;
+ int ret;
+
+ cpupll = devm_kzalloc(&pdev->dev, sizeof(*cpupll), GFP_KERNEL);
+ if (!cpupll)
+ return -ENOMEM;
+
+ cpupll->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(cpupll->base))
+ return PTR_ERR(cpupll->base);
+
+ /* LPF might not contain the current frequency so fix that up */
+ msc313_cpupll_reg_write32(cpupll, REG_LPF_LOW_L,
+ msc313_cpupll_reg_read32(cpupll, REG_CURRENT));
+
+ clk_init.name = dev_name(dev);
+ clk_init.ops = &msc313_cpupll_ops;
+ clk_init.parent_data = &cpupll_parent;
+ clk_init.num_parents = 1;
+ cpupll->clk_hw.init = &clk_init;
+
+ ret = devm_clk_hw_register(dev, &cpupll->clk_hw);
+ if (ret)
+ return ret;
+
+ return of_clk_add_hw_provider(pdev->dev.of_node, of_clk_hw_simple_get, &cpupll->clk_hw);
+}
+
+static struct platform_driver msc313_cpupll_driver = {
+ .driver = {
+ .name = "mstar-msc313-cpupll",
+ .of_match_table = msc313_cpupll_of_match,
+ },
+ .probe = msc313_cpupll_probe,
+};
+builtin_platform_driver(msc313_cpupll_driver);
--
2.34.1
^ permalink raw reply related [flat|nested] 24+ messages in thread* [PATCH v3 2/9] clk: mstar: msc313 cpupll clk driver
@ 2022-01-21 19:35 ` Romain Perier
0 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel, Willy Tarreau
From: Daniel Palmer <daniel@0x0f.com>
Add a driver for the CPU pll/ARM pll/MIPS pll that is present
in MStar SoCs.
Currently there is no documentation for this block so it's possible
this driver isn't entirely correct.
Only tested on the version of this IP in the MStar/SigmaStar
ARMv7 SoCs.
Co-authored-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
---
drivers/clk/mstar/Kconfig | 8 +
drivers/clk/mstar/Makefile | 2 +-
drivers/clk/mstar/clk-msc313-cpupll.c | 221 ++++++++++++++++++++++++++
3 files changed, 230 insertions(+), 1 deletion(-)
create mode 100644 drivers/clk/mstar/clk-msc313-cpupll.c
diff --git a/drivers/clk/mstar/Kconfig b/drivers/clk/mstar/Kconfig
index de37e1bce2d2..146eeb637318 100644
--- a/drivers/clk/mstar/Kconfig
+++ b/drivers/clk/mstar/Kconfig
@@ -1,4 +1,11 @@
# SPDX-License-Identifier: GPL-2.0-only
+config MSTAR_MSC313_CPUPLL
+ bool "MStar CPUPLL driver"
+ depends on ARCH_MSTARV7 || COMPILE_TEST
+ default ARCH_MSTARV7
+ help
+ Support for the CPU PLL present on MStar/Sigmastar SoCs.
+
config MSTAR_MSC313_MPLL
bool "MStar MPLL driver"
depends on ARCH_MSTARV7 || COMPILE_TEST
@@ -7,3 +14,4 @@ config MSTAR_MSC313_MPLL
help
Support for the MPLL PLL and dividers block present on
MStar/Sigmastar SoCs.
+
diff --git a/drivers/clk/mstar/Makefile b/drivers/clk/mstar/Makefile
index f8dcd25ede1d..21296a04e65a 100644
--- a/drivers/clk/mstar/Makefile
+++ b/drivers/clk/mstar/Makefile
@@ -2,5 +2,5 @@
#
# Makefile for mstar specific clk
#
-
+obj-$(CONFIG_MSTAR_MSC313_CPUPLL) += clk-msc313-cpupll.o
obj-$(CONFIG_MSTAR_MSC313_MPLL) += clk-msc313-mpll.o
diff --git a/drivers/clk/mstar/clk-msc313-cpupll.c b/drivers/clk/mstar/clk-msc313-cpupll.c
new file mode 100644
index 000000000000..c57b509e8c20
--- /dev/null
+++ b/drivers/clk/mstar/clk-msc313-cpupll.c
@@ -0,0 +1,221 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 Daniel Palmer <daniel@thingy.jp>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+
+/*
+ * This IP is not documented outside of the messy vendor driver.
+ * Below is what we think the registers look like based on looking at
+ * the vendor code and poking at the hardware:
+ *
+ * 0x140 -- LPF low. Seems to store one half of the clock transition
+ * 0x144 /
+ * 0x148 -- LPF high. Seems to store one half of the clock transition
+ * 0x14c /
+ * 0x150 -- vendor code says "toggle lpf enable"
+ * 0x154 -- mu?
+ * 0x15c -- lpf_update_count?
+ * 0x160 -- vendor code says "switch to LPF". Clock source config? Register bank?
+ * 0x164 -- vendor code says "from low to high" which seems to mean transition from LPF low to
+ * LPF high.
+ * 0x174 -- Seems to be the PLL lock status bit
+ * 0x180 -- Seems to be the current frequency, this might need to be populated by software?
+ * 0x184 / The vendor driver uses these to set the initial value of LPF low
+ *
+ * Frequency seems to be calculated like this:
+ * (parent clock (432mhz) / register_magic_value) * 16 * 524288
+ * Only the lower 24 bits of the resulting value will be used. In addition, the
+ * PLL doesn't seem to be able to lock on frequencies lower than 220 MHz, as
+ * divisor 0xfb586f (220 MHz) works but 0xfb7fff locks up.
+ *
+ * Vendor values:
+ * frequency - register value
+ *
+ * 400000000 - 0x0067AE14
+ * 600000000 - 0x00451EB8,
+ * 800000000 - 0x0033D70A,
+ * 1000000000 - 0x002978d4,
+ */
+
+#define REG_LPF_LOW_L 0x140
+#define REG_LPF_LOW_H 0x144
+#define REG_LPF_HIGH_BOTTOM 0x148
+#define REG_LPF_HIGH_TOP 0x14c
+#define REG_LPF_TOGGLE 0x150
+#define REG_LPF_MYSTERYTWO 0x154
+#define REG_LPF_UPDATE_COUNT 0x15c
+#define REG_LPF_MYSTERYONE 0x160
+#define REG_LPF_TRANSITIONCTRL 0x164
+#define REG_LPF_LOCK 0x174
+#define REG_CURRENT 0x180
+
+#define LPF_LOCK_TIMEOUT 100000000
+
+#define MULTIPLIER_1 16
+#define MULTIPLIER_2 524288
+#define MULTIPLIER (MULTIPLIER_1 * MULTIPLIER_2)
+
+struct msc313_cpupll {
+ void __iomem *base;
+ struct clk_hw clk_hw;
+};
+
+#define to_cpupll(_hw) container_of(_hw, struct msc313_cpupll, clk_hw)
+
+static u32 msc313_cpupll_reg_read32(struct msc313_cpupll *cpupll, unsigned int reg)
+{
+ u32 value;
+
+ value = ioread16(cpupll->base + reg + 4) << 16;
+ value |= ioread16(cpupll->base + reg);
+
+ return value;
+}
+
+static void msc313_cpupll_reg_write32(struct msc313_cpupll *cpupll, unsigned int reg, u32 value)
+{
+ u16 l = value & 0xffff, h = (value >> 16) & 0xffff;
+
+ iowrite16(l, cpupll->base + reg);
+ iowrite16(h, cpupll->base + reg + 4);
+}
+
+static void msc313_cpupll_setfreq(struct msc313_cpupll *cpupll, u32 regvalue)
+{
+ ktime_t timeout;
+
+ msc313_cpupll_reg_write32(cpupll, REG_LPF_HIGH_BOTTOM, regvalue);
+
+ iowrite16(0x1, cpupll->base + REG_LPF_MYSTERYONE);
+ iowrite16(0x6, cpupll->base + REG_LPF_MYSTERYTWO);
+ iowrite16(0x8, cpupll->base + REG_LPF_UPDATE_COUNT);
+ iowrite16(BIT(12), cpupll->base + REG_LPF_TRANSITIONCTRL);
+
+ iowrite16(0, cpupll->base + REG_LPF_TOGGLE);
+ iowrite16(1, cpupll->base + REG_LPF_TOGGLE);
+
+ timeout = ktime_add_ns(ktime_get(), LPF_LOCK_TIMEOUT);
+ while (!(ioread16(cpupll->base + REG_LPF_LOCK))) {
+ if (ktime_after(ktime_get(), timeout)) {
+ pr_err("timeout waiting for LPF_LOCK\n");
+ return;
+ }
+ cpu_relax();
+ }
+
+ iowrite16(0, cpupll->base + REG_LPF_TOGGLE);
+
+ msc313_cpupll_reg_write32(cpupll, REG_LPF_LOW_L, regvalue);
+}
+
+static unsigned long msc313_cpupll_frequencyforreg(u32 reg, unsigned long parent_rate)
+{
+ unsigned long long prescaled = ((unsigned long long)parent_rate) * MULTIPLIER;
+
+ if (prescaled == 0 || reg == 0)
+ return 0;
+ return DIV_ROUND_DOWN_ULL(prescaled, reg);
+}
+
+static u32 msc313_cpupll_regforfrequecy(unsigned long rate, unsigned long parent_rate)
+{
+ unsigned long long prescaled = ((unsigned long long)parent_rate) * MULTIPLIER;
+
+ if (prescaled == 0 || rate == 0)
+ return 0;
+ return DIV_ROUND_UP_ULL(prescaled, rate);
+}
+
+static unsigned long msc313_cpupll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
+{
+ struct msc313_cpupll *cpupll = to_cpupll(hw);
+
+ return msc313_cpupll_frequencyforreg(msc313_cpupll_reg_read32(cpupll, REG_LPF_LOW_L),
+ parent_rate);
+}
+
+static long msc313_cpupll_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ u32 reg = msc313_cpupll_regforfrequecy(rate, *parent_rate);
+ long rounded = msc313_cpupll_frequencyforreg(reg, *parent_rate);
+
+ /*
+ * This is my poor attempt at making sure the resulting
+ * rate doesn't overshoot the requested rate.
+ */
+ for (; rounded >= rate && reg > 0; reg--)
+ rounded = msc313_cpupll_frequencyforreg(reg, *parent_rate);
+
+ return rounded;
+}
+
+static int msc313_cpupll_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long parent_rate)
+{
+ struct msc313_cpupll *cpupll = to_cpupll(hw);
+ u32 reg = msc313_cpupll_regforfrequecy(rate, parent_rate);
+
+ msc313_cpupll_setfreq(cpupll, reg);
+
+ return 0;
+}
+
+static const struct clk_ops msc313_cpupll_ops = {
+ .recalc_rate = msc313_cpupll_recalc_rate,
+ .round_rate = msc313_cpupll_round_rate,
+ .set_rate = msc313_cpupll_set_rate,
+};
+
+static const struct of_device_id msc313_cpupll_of_match[] = {
+ { .compatible = "mstar,msc313-cpupll" },
+ {}
+};
+
+static const struct clk_parent_data cpupll_parent = {
+ .index = 0,
+};
+
+static int msc313_cpupll_probe(struct platform_device *pdev)
+{
+ struct clk_init_data clk_init = {};
+ struct device *dev = &pdev->dev;
+ struct msc313_cpupll *cpupll;
+ int ret;
+
+ cpupll = devm_kzalloc(&pdev->dev, sizeof(*cpupll), GFP_KERNEL);
+ if (!cpupll)
+ return -ENOMEM;
+
+ cpupll->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(cpupll->base))
+ return PTR_ERR(cpupll->base);
+
+ /* LPF might not contain the current frequency so fix that up */
+ msc313_cpupll_reg_write32(cpupll, REG_LPF_LOW_L,
+ msc313_cpupll_reg_read32(cpupll, REG_CURRENT));
+
+ clk_init.name = dev_name(dev);
+ clk_init.ops = &msc313_cpupll_ops;
+ clk_init.parent_data = &cpupll_parent;
+ clk_init.num_parents = 1;
+ cpupll->clk_hw.init = &clk_init;
+
+ ret = devm_clk_hw_register(dev, &cpupll->clk_hw);
+ if (ret)
+ return ret;
+
+ return of_clk_add_hw_provider(pdev->dev.of_node, of_clk_hw_simple_get, &cpupll->clk_hw);
+}
+
+static struct platform_driver msc313_cpupll_driver = {
+ .driver = {
+ .name = "mstar-msc313-cpupll",
+ .of_match_table = msc313_cpupll_of_match,
+ },
+ .probe = msc313_cpupll_probe,
+};
+builtin_platform_driver(msc313_cpupll_driver);
--
2.34.1
_______________________________________________
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 24+ messages in thread
* [PATCH v3 3/9] ARM: mstar: Add cpupll to base dtsi
2022-01-21 19:35 ` Romain Perier
@ 2022-01-21 19:35 ` Romain Perier
-1 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel
From: Daniel Palmer <daniel@0x0f.com>
All MStar/SigmaStar ARMv7 SoCs have the CPU PLL at the same
place so add it to the base dtsi.
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
---
arch/arm/boot/dts/mstar-v7.dtsi | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arm/boot/dts/mstar-v7.dtsi b/arch/arm/boot/dts/mstar-v7.dtsi
index 89ebfe4f29da..2249faaa3aa7 100644
--- a/arch/arm/boot/dts/mstar-v7.dtsi
+++ b/arch/arm/boot/dts/mstar-v7.dtsi
@@ -155,6 +155,13 @@ mpll: mpll@206000 {
clocks = <&xtal>;
};
+ cpupll: cpupll@206400 {
+ compatible = "mstar,msc313-cpupll";
+ reg = <0x206400 0x200>;
+ #clock-cells = <0>;
+ clocks = <&mpll MSTAR_MSC313_MPLL_DIV2>;
+ };
+
gpio: gpio@207800 {
#gpio-cells = <2>;
reg = <0x207800 0x200>;
--
2.34.1
^ permalink raw reply related [flat|nested] 24+ messages in thread* [PATCH v3 3/9] ARM: mstar: Add cpupll to base dtsi
@ 2022-01-21 19:35 ` Romain Perier
0 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel
From: Daniel Palmer <daniel@0x0f.com>
All MStar/SigmaStar ARMv7 SoCs have the CPU PLL at the same
place so add it to the base dtsi.
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
---
arch/arm/boot/dts/mstar-v7.dtsi | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arm/boot/dts/mstar-v7.dtsi b/arch/arm/boot/dts/mstar-v7.dtsi
index 89ebfe4f29da..2249faaa3aa7 100644
--- a/arch/arm/boot/dts/mstar-v7.dtsi
+++ b/arch/arm/boot/dts/mstar-v7.dtsi
@@ -155,6 +155,13 @@ mpll: mpll@206000 {
clocks = <&xtal>;
};
+ cpupll: cpupll@206400 {
+ compatible = "mstar,msc313-cpupll";
+ reg = <0x206400 0x200>;
+ #clock-cells = <0>;
+ clocks = <&mpll MSTAR_MSC313_MPLL_DIV2>;
+ };
+
gpio: gpio@207800 {
#gpio-cells = <2>;
reg = <0x207800 0x200>;
--
2.34.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 24+ messages in thread* Re: [PATCH v3 3/9] ARM: mstar: Add cpupll to base dtsi
2022-01-21 19:35 ` Romain Perier
@ 2022-01-23 5:10 ` Daniel Palmer
-1 siblings, 0 replies; 24+ messages in thread
From: Daniel Palmer @ 2022-01-23 5:10 UTC (permalink / raw)
To: Romain Perier
Cc: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Rob Herring, DTML, linux-arm-kernel, Linux Kernel Mailing List
Hi Romain,
On Sat, 22 Jan 2022 at 04:35, Romain Perier <romain.perier@gmail.com> wrote:
>
> From: Daniel Palmer <daniel@0x0f.com>
>
> All MStar/SigmaStar ARMv7 SoCs have the CPU PLL at the same
> place so add it to the base dtsi.
>
> Signed-off-by: Daniel Palmer <daniel@0x0f.com>
> ---
> arch/arm/boot/dts/mstar-v7.dtsi | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/arch/arm/boot/dts/mstar-v7.dtsi b/arch/arm/boot/dts/mstar-v7.dtsi
> index 89ebfe4f29da..2249faaa3aa7 100644
> --- a/arch/arm/boot/dts/mstar-v7.dtsi
> +++ b/arch/arm/boot/dts/mstar-v7.dtsi
> @@ -155,6 +155,13 @@ mpll: mpll@206000 {
> clocks = <&xtal>;
> };
>
> + cpupll: cpupll@206400 {
> + compatible = "mstar,msc313-cpupll";
> + reg = <0x206400 0x200>;
> + #clock-cells = <0>;
> + clocks = <&mpll MSTAR_MSC313_MPLL_DIV2>;
> + };
> +
> gpio: gpio@207800 {
> #gpio-cells = <2>;
> reg = <0x207800 0x200>;
> --
> 2.34.1
>
I guess I can't add a reviewed by for my own commit but this looks good to me.
The same CPUPLL is present on all of the chips seen so far so this is
the right place for this.
Cheers,
Daniel
^ permalink raw reply [flat|nested] 24+ messages in thread* Re: [PATCH v3 3/9] ARM: mstar: Add cpupll to base dtsi
@ 2022-01-23 5:10 ` Daniel Palmer
0 siblings, 0 replies; 24+ messages in thread
From: Daniel Palmer @ 2022-01-23 5:10 UTC (permalink / raw)
To: Romain Perier
Cc: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Rob Herring, DTML, linux-arm-kernel, Linux Kernel Mailing List
Hi Romain,
On Sat, 22 Jan 2022 at 04:35, Romain Perier <romain.perier@gmail.com> wrote:
>
> From: Daniel Palmer <daniel@0x0f.com>
>
> All MStar/SigmaStar ARMv7 SoCs have the CPU PLL at the same
> place so add it to the base dtsi.
>
> Signed-off-by: Daniel Palmer <daniel@0x0f.com>
> ---
> arch/arm/boot/dts/mstar-v7.dtsi | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/arch/arm/boot/dts/mstar-v7.dtsi b/arch/arm/boot/dts/mstar-v7.dtsi
> index 89ebfe4f29da..2249faaa3aa7 100644
> --- a/arch/arm/boot/dts/mstar-v7.dtsi
> +++ b/arch/arm/boot/dts/mstar-v7.dtsi
> @@ -155,6 +155,13 @@ mpll: mpll@206000 {
> clocks = <&xtal>;
> };
>
> + cpupll: cpupll@206400 {
> + compatible = "mstar,msc313-cpupll";
> + reg = <0x206400 0x200>;
> + #clock-cells = <0>;
> + clocks = <&mpll MSTAR_MSC313_MPLL_DIV2>;
> + };
> +
> gpio: gpio@207800 {
> #gpio-cells = <2>;
> reg = <0x207800 0x200>;
> --
> 2.34.1
>
I guess I can't add a reviewed by for my own commit but this looks good to me.
The same CPUPLL is present on all of the chips seen so far so this is
the right place for this.
Cheers,
Daniel
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 24+ messages in thread
* [PATCH v3 4/9] ARM: mstar: Link cpupll to cpu
2022-01-21 19:35 ` Romain Perier
@ 2022-01-21 19:35 ` Romain Perier
-1 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel
From: Daniel Palmer <daniel@0x0f.com>
The CPU clock is sourced from the CPU PLL.
Link cpupll to the cpu so that frequency scaling can happen.
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
---
arch/arm/boot/dts/mstar-v7.dtsi | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm/boot/dts/mstar-v7.dtsi b/arch/arm/boot/dts/mstar-v7.dtsi
index 2249faaa3aa7..c26ba9b7b6dd 100644
--- a/arch/arm/boot/dts/mstar-v7.dtsi
+++ b/arch/arm/boot/dts/mstar-v7.dtsi
@@ -21,6 +21,8 @@ cpu0: cpu@0 {
device_type = "cpu";
compatible = "arm,cortex-a7";
reg = <0x0>;
+ clocks = <&cpupll>;
+ clock-names = "cpuclk";
};
};
--
2.34.1
^ permalink raw reply related [flat|nested] 24+ messages in thread* [PATCH v3 4/9] ARM: mstar: Link cpupll to cpu
@ 2022-01-21 19:35 ` Romain Perier
0 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel
From: Daniel Palmer <daniel@0x0f.com>
The CPU clock is sourced from the CPU PLL.
Link cpupll to the cpu so that frequency scaling can happen.
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
---
arch/arm/boot/dts/mstar-v7.dtsi | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm/boot/dts/mstar-v7.dtsi b/arch/arm/boot/dts/mstar-v7.dtsi
index 2249faaa3aa7..c26ba9b7b6dd 100644
--- a/arch/arm/boot/dts/mstar-v7.dtsi
+++ b/arch/arm/boot/dts/mstar-v7.dtsi
@@ -21,6 +21,8 @@ cpu0: cpu@0 {
device_type = "cpu";
compatible = "arm,cortex-a7";
reg = <0x0>;
+ clocks = <&cpupll>;
+ clock-names = "cpuclk";
};
};
--
2.34.1
_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 24+ messages in thread
* [PATCH v3 5/9] ARM: mstar: Link cpupll to second core
2022-01-21 19:35 ` Romain Perier
@ 2022-01-21 19:35 ` Romain Perier
-1 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel
From: Daniel Palmer <daniel@0x0f.com>
The second core also sources it's clock from the CPU PLL.
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
---
arch/arm/boot/dts/mstar-infinity2m.dtsi | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm/boot/dts/mstar-infinity2m.dtsi b/arch/arm/boot/dts/mstar-infinity2m.dtsi
index 6d4d1d224e96..dc339cd29778 100644
--- a/arch/arm/boot/dts/mstar-infinity2m.dtsi
+++ b/arch/arm/boot/dts/mstar-infinity2m.dtsi
@@ -11,6 +11,8 @@ cpu1: cpu@1 {
device_type = "cpu";
compatible = "arm,cortex-a7";
reg = <0x1>;
+ clocks = <&cpupll>;
+ clock-names = "cpuclk";
};
};
--
2.34.1
^ permalink raw reply related [flat|nested] 24+ messages in thread* [PATCH v3 5/9] ARM: mstar: Link cpupll to second core
@ 2022-01-21 19:35 ` Romain Perier
0 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel
From: Daniel Palmer <daniel@0x0f.com>
The second core also sources it's clock from the CPU PLL.
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
---
arch/arm/boot/dts/mstar-infinity2m.dtsi | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm/boot/dts/mstar-infinity2m.dtsi b/arch/arm/boot/dts/mstar-infinity2m.dtsi
index 6d4d1d224e96..dc339cd29778 100644
--- a/arch/arm/boot/dts/mstar-infinity2m.dtsi
+++ b/arch/arm/boot/dts/mstar-infinity2m.dtsi
@@ -11,6 +11,8 @@ cpu1: cpu@1 {
device_type = "cpu";
compatible = "arm,cortex-a7";
reg = <0x1>;
+ clocks = <&cpupll>;
+ clock-names = "cpuclk";
};
};
--
2.34.1
_______________________________________________
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 24+ messages in thread
* [PATCH v3 6/9] ARM: mstar: Add OPP table for infinity
2022-01-21 19:35 ` Romain Perier
@ 2022-01-21 19:35 ` Romain Perier
-1 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel, Willy Tarreau
From: Daniel Palmer <daniel@0x0f.com>
Add an OPP table for the inifinity chips so
that cpu frequency scaling can happen.
Co-authored-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
---
arch/arm/boot/dts/mstar-infinity.dtsi | 34 +++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/arch/arm/boot/dts/mstar-infinity.dtsi b/arch/arm/boot/dts/mstar-infinity.dtsi
index 0bee517797f4..441a917b88ba 100644
--- a/arch/arm/boot/dts/mstar-infinity.dtsi
+++ b/arch/arm/boot/dts/mstar-infinity.dtsi
@@ -8,6 +8,40 @@
#include <dt-bindings/gpio/msc313-gpio.h>
+/ {
+ cpu0_opp_table: opp_table0 {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp-240000000 {
+ opp-hz = /bits/ 64 <240000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ };
+
+ opp-400000000 {
+ opp-hz = /bits/ 64 <400000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ };
+ opp-600000000 {
+ opp-hz = /bits/ 64 <600000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ };
+
+ opp-800000000 {
+ opp-hz = /bits/ 64 <800000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ };
+ };
+};
+
+&cpu0 {
+ operating-points-v2 = <&cpu0_opp_table>;
+};
+
&imi {
reg = <0xa0000000 0x16000>;
};
--
2.34.1
^ permalink raw reply related [flat|nested] 24+ messages in thread* [PATCH v3 6/9] ARM: mstar: Add OPP table for infinity
@ 2022-01-21 19:35 ` Romain Perier
0 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel, Willy Tarreau
From: Daniel Palmer <daniel@0x0f.com>
Add an OPP table for the inifinity chips so
that cpu frequency scaling can happen.
Co-authored-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
---
arch/arm/boot/dts/mstar-infinity.dtsi | 34 +++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/arch/arm/boot/dts/mstar-infinity.dtsi b/arch/arm/boot/dts/mstar-infinity.dtsi
index 0bee517797f4..441a917b88ba 100644
--- a/arch/arm/boot/dts/mstar-infinity.dtsi
+++ b/arch/arm/boot/dts/mstar-infinity.dtsi
@@ -8,6 +8,40 @@
#include <dt-bindings/gpio/msc313-gpio.h>
+/ {
+ cpu0_opp_table: opp_table0 {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp-240000000 {
+ opp-hz = /bits/ 64 <240000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ };
+
+ opp-400000000 {
+ opp-hz = /bits/ 64 <400000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ };
+ opp-600000000 {
+ opp-hz = /bits/ 64 <600000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ };
+
+ opp-800000000 {
+ opp-hz = /bits/ 64 <800000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ };
+ };
+};
+
+&cpu0 {
+ operating-points-v2 = <&cpu0_opp_table>;
+};
+
&imi {
reg = <0xa0000000 0x16000>;
};
--
2.34.1
_______________________________________________
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^ permalink raw reply related [flat|nested] 24+ messages in thread
* [PATCH v3 7/9] ARM: mstar: Add OPP table for infinity3
2022-01-21 19:35 ` Romain Perier
@ 2022-01-21 19:35 ` Romain Perier
-1 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel, Willy Tarreau
From: Daniel Palmer <daniel@0x0f.com>
The infinity3 has a slightly higher max frequency
compared to the infinity so extend the OPP table.
Co-authored-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
---
arch/arm/boot/dts/mstar-infinity3.dtsi | 58 ++++++++++++++++++++++++++
1 file changed, 58 insertions(+)
diff --git a/arch/arm/boot/dts/mstar-infinity3.dtsi b/arch/arm/boot/dts/mstar-infinity3.dtsi
index 9857e2a9934d..a56cf29e5d82 100644
--- a/arch/arm/boot/dts/mstar-infinity3.dtsi
+++ b/arch/arm/boot/dts/mstar-infinity3.dtsi
@@ -6,6 +6,64 @@
#include "mstar-infinity.dtsi"
+&cpu0_opp_table {
+ opp-1008000000 {
+ opp-hz = /bits/ 64 <1008000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ };
+
+ // overclock frequencies below, shown to work fine up to 1.3 GHz
+ opp-108000000 {
+ opp-hz = /bits/ 64 <1080000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ turbo-mode;
+ };
+
+ opp-1188000000 {
+ opp-hz = /bits/ 64 <1188000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ turbo-mode;
+ };
+
+ opp-1296000000 {
+ opp-hz = /bits/ 64 <1296000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ turbo-mode;
+ };
+
+ opp-1350000000 {
+ opp-hz = /bits/ 64 <1350000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ turbo-mode;
+ };
+
+ opp-1404000000 {
+ opp-hz = /bits/ 64 <1404000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ turbo-mode;
+ };
+
+ opp-1458000000 {
+ opp-hz = /bits/ 64 <1458000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ turbo-mode;
+ };
+
+ opp-1512000000 {
+ opp-hz = /bits/ 64 <1512000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ turbo-mode;
+ };
+};
+
&imi {
reg = <0xa0000000 0x20000>;
};
--
2.34.1
^ permalink raw reply related [flat|nested] 24+ messages in thread* [PATCH v3 7/9] ARM: mstar: Add OPP table for infinity3
@ 2022-01-21 19:35 ` Romain Perier
0 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel, Willy Tarreau
From: Daniel Palmer <daniel@0x0f.com>
The infinity3 has a slightly higher max frequency
compared to the infinity so extend the OPP table.
Co-authored-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
---
arch/arm/boot/dts/mstar-infinity3.dtsi | 58 ++++++++++++++++++++++++++
1 file changed, 58 insertions(+)
diff --git a/arch/arm/boot/dts/mstar-infinity3.dtsi b/arch/arm/boot/dts/mstar-infinity3.dtsi
index 9857e2a9934d..a56cf29e5d82 100644
--- a/arch/arm/boot/dts/mstar-infinity3.dtsi
+++ b/arch/arm/boot/dts/mstar-infinity3.dtsi
@@ -6,6 +6,64 @@
#include "mstar-infinity.dtsi"
+&cpu0_opp_table {
+ opp-1008000000 {
+ opp-hz = /bits/ 64 <1008000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ };
+
+ // overclock frequencies below, shown to work fine up to 1.3 GHz
+ opp-108000000 {
+ opp-hz = /bits/ 64 <1080000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ turbo-mode;
+ };
+
+ opp-1188000000 {
+ opp-hz = /bits/ 64 <1188000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ turbo-mode;
+ };
+
+ opp-1296000000 {
+ opp-hz = /bits/ 64 <1296000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ turbo-mode;
+ };
+
+ opp-1350000000 {
+ opp-hz = /bits/ 64 <1350000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ turbo-mode;
+ };
+
+ opp-1404000000 {
+ opp-hz = /bits/ 64 <1404000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ turbo-mode;
+ };
+
+ opp-1458000000 {
+ opp-hz = /bits/ 64 <1458000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ turbo-mode;
+ };
+
+ opp-1512000000 {
+ opp-hz = /bits/ 64 <1512000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ turbo-mode;
+ };
+};
+
&imi {
reg = <0xa0000000 0x20000>;
};
--
2.34.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 24+ messages in thread
* [PATCH v3 8/9] ARM: mstar: Add OPP table for mercury5
2022-01-21 19:35 ` Romain Perier
@ 2022-01-21 19:35 ` Romain Perier
-1 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel
From: Daniel Palmer <daniel@0x0f.com>
Add an OPP table for mercury5 so that cpu frequency scaling can
happen.
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
---
arch/arm/boot/dts/mstar-mercury5.dtsi | 36 +++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/arch/arm/boot/dts/mstar-mercury5.dtsi b/arch/arm/boot/dts/mstar-mercury5.dtsi
index a7d0dd9d6132..80a19bd23c9c 100644
--- a/arch/arm/boot/dts/mstar-mercury5.dtsi
+++ b/arch/arm/boot/dts/mstar-mercury5.dtsi
@@ -6,6 +6,42 @@
#include "mstar-v7.dtsi"
+/ {
+ cpu0_opp_table: opp_table0 {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp-100000000 {
+ opp-hz = /bits/ 64 <100000000>;
+ opp-microvolt = <800000 800000 850000>;
+ clock-latency-ns = <300000>;
+ };
+
+ opp-200000000 {
+ opp-hz = /bits/ 64 <200000000>;
+ opp-microvolt = <850000 850000 880000>;
+ clock-latency-ns = <300000>;
+ };
+
+ opp-400000000 {
+ opp-hz = /bits/ 64 <400000000>;
+ opp-microvolt = <880000 880000 890000>;
+ clock-latency-ns = <300000>;
+ };
+ opp-600000000 {
+ opp-hz = /bits/ 64 <600000000>;
+ opp-microvolt = <900000 900000 1000000>;
+ clock-latency-ns = <300000>;
+ };
+
+ opp-800000000 {
+ opp-hz = /bits/ 64 <800000000>;
+ opp-microvolt = <900000 900000 1000000>;
+ clock-latency-ns = <300000>;
+ };
+ };
+};
+
&imi {
reg = <0xa0000000 0x20000>;
};
--
2.34.1
^ permalink raw reply related [flat|nested] 24+ messages in thread* [PATCH v3 8/9] ARM: mstar: Add OPP table for mercury5
@ 2022-01-21 19:35 ` Romain Perier
0 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel
From: Daniel Palmer <daniel@0x0f.com>
Add an OPP table for mercury5 so that cpu frequency scaling can
happen.
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
---
arch/arm/boot/dts/mstar-mercury5.dtsi | 36 +++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/arch/arm/boot/dts/mstar-mercury5.dtsi b/arch/arm/boot/dts/mstar-mercury5.dtsi
index a7d0dd9d6132..80a19bd23c9c 100644
--- a/arch/arm/boot/dts/mstar-mercury5.dtsi
+++ b/arch/arm/boot/dts/mstar-mercury5.dtsi
@@ -6,6 +6,42 @@
#include "mstar-v7.dtsi"
+/ {
+ cpu0_opp_table: opp_table0 {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp-100000000 {
+ opp-hz = /bits/ 64 <100000000>;
+ opp-microvolt = <800000 800000 850000>;
+ clock-latency-ns = <300000>;
+ };
+
+ opp-200000000 {
+ opp-hz = /bits/ 64 <200000000>;
+ opp-microvolt = <850000 850000 880000>;
+ clock-latency-ns = <300000>;
+ };
+
+ opp-400000000 {
+ opp-hz = /bits/ 64 <400000000>;
+ opp-microvolt = <880000 880000 890000>;
+ clock-latency-ns = <300000>;
+ };
+ opp-600000000 {
+ opp-hz = /bits/ 64 <600000000>;
+ opp-microvolt = <900000 900000 1000000>;
+ clock-latency-ns = <300000>;
+ };
+
+ opp-800000000 {
+ opp-hz = /bits/ 64 <800000000>;
+ opp-microvolt = <900000 900000 1000000>;
+ clock-latency-ns = <300000>;
+ };
+ };
+};
+
&imi {
reg = <0xa0000000 0x20000>;
};
--
2.34.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 24+ messages in thread* Re: [PATCH v3 8/9] ARM: mstar: Add OPP table for mercury5
2022-01-21 19:35 ` Romain Perier
@ 2022-01-23 5:12 ` Daniel Palmer
-1 siblings, 0 replies; 24+ messages in thread
From: Daniel Palmer @ 2022-01-23 5:12 UTC (permalink / raw)
To: Romain Perier
Cc: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Rob Herring, DTML, linux-arm-kernel, Linux Kernel Mailing List
Hi Romain,
On Sat, 22 Jan 2022 at 04:35, Romain Perier <romain.perier@gmail.com> wrote:
>
> From: Daniel Palmer <daniel@0x0f.com>
>
> Add an OPP table for mercury5 so that cpu frequency scaling can
> happen.
>
> Signed-off-by: Daniel Palmer <daniel@0x0f.com>
> ---
> arch/arm/boot/dts/mstar-mercury5.dtsi | 36 +++++++++++++++++++++++++++
> 1 file changed, 36 insertions(+)
>
> diff --git a/arch/arm/boot/dts/mstar-mercury5.dtsi b/arch/arm/boot/dts/mstar-mercury5.dtsi
> index a7d0dd9d6132..80a19bd23c9c 100644
> --- a/arch/arm/boot/dts/mstar-mercury5.dtsi
> +++ b/arch/arm/boot/dts/mstar-mercury5.dtsi
> @@ -6,6 +6,42 @@
>
> #include "mstar-v7.dtsi"
>
> +/ {
> + cpu0_opp_table: opp_table0 {
> + compatible = "operating-points-v2";
> + opp-shared;
> +
> + opp-100000000 {
> + opp-hz = /bits/ 64 <100000000>;
> + opp-microvolt = <800000 800000 850000>;
> + clock-latency-ns = <300000>;
> + };
> +
> + opp-200000000 {
> + opp-hz = /bits/ 64 <200000000>;
> + opp-microvolt = <850000 850000 880000>;
> + clock-latency-ns = <300000>;
> + };
> +
> + opp-400000000 {
> + opp-hz = /bits/ 64 <400000000>;
> + opp-microvolt = <880000 880000 890000>;
> + clock-latency-ns = <300000>;
> + };
> + opp-600000000 {
> + opp-hz = /bits/ 64 <600000000>;
> + opp-microvolt = <900000 900000 1000000>;
> + clock-latency-ns = <300000>;
> + };
> +
> + opp-800000000 {
> + opp-hz = /bits/ 64 <800000000>;
> + opp-microvolt = <900000 900000 1000000>;
> + clock-latency-ns = <300000>;
> + };
> + };
> +};
> +
> &imi {
> reg = <0xa0000000 0x20000>;
> };
> --
> 2.34.1
>
I think we should drop this one when applying as the frequencies need
to be checked on the hardware again.
I think they should probably match the msc313e settings that Willy verified.
Cheers,
Daniel
^ permalink raw reply [flat|nested] 24+ messages in thread* Re: [PATCH v3 8/9] ARM: mstar: Add OPP table for mercury5
@ 2022-01-23 5:12 ` Daniel Palmer
0 siblings, 0 replies; 24+ messages in thread
From: Daniel Palmer @ 2022-01-23 5:12 UTC (permalink / raw)
To: Romain Perier
Cc: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Rob Herring, DTML, linux-arm-kernel, Linux Kernel Mailing List
Hi Romain,
On Sat, 22 Jan 2022 at 04:35, Romain Perier <romain.perier@gmail.com> wrote:
>
> From: Daniel Palmer <daniel@0x0f.com>
>
> Add an OPP table for mercury5 so that cpu frequency scaling can
> happen.
>
> Signed-off-by: Daniel Palmer <daniel@0x0f.com>
> ---
> arch/arm/boot/dts/mstar-mercury5.dtsi | 36 +++++++++++++++++++++++++++
> 1 file changed, 36 insertions(+)
>
> diff --git a/arch/arm/boot/dts/mstar-mercury5.dtsi b/arch/arm/boot/dts/mstar-mercury5.dtsi
> index a7d0dd9d6132..80a19bd23c9c 100644
> --- a/arch/arm/boot/dts/mstar-mercury5.dtsi
> +++ b/arch/arm/boot/dts/mstar-mercury5.dtsi
> @@ -6,6 +6,42 @@
>
> #include "mstar-v7.dtsi"
>
> +/ {
> + cpu0_opp_table: opp_table0 {
> + compatible = "operating-points-v2";
> + opp-shared;
> +
> + opp-100000000 {
> + opp-hz = /bits/ 64 <100000000>;
> + opp-microvolt = <800000 800000 850000>;
> + clock-latency-ns = <300000>;
> + };
> +
> + opp-200000000 {
> + opp-hz = /bits/ 64 <200000000>;
> + opp-microvolt = <850000 850000 880000>;
> + clock-latency-ns = <300000>;
> + };
> +
> + opp-400000000 {
> + opp-hz = /bits/ 64 <400000000>;
> + opp-microvolt = <880000 880000 890000>;
> + clock-latency-ns = <300000>;
> + };
> + opp-600000000 {
> + opp-hz = /bits/ 64 <600000000>;
> + opp-microvolt = <900000 900000 1000000>;
> + clock-latency-ns = <300000>;
> + };
> +
> + opp-800000000 {
> + opp-hz = /bits/ 64 <800000000>;
> + opp-microvolt = <900000 900000 1000000>;
> + clock-latency-ns = <300000>;
> + };
> + };
> +};
> +
> &imi {
> reg = <0xa0000000 0x20000>;
> };
> --
> 2.34.1
>
I think we should drop this one when applying as the frequencies need
to be checked on the hardware again.
I think they should probably match the msc313e settings that Willy verified.
Cheers,
Daniel
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 24+ messages in thread
* [PATCH v3 9/9] ARM: mstar: Extend opp_table for infinity2m
2022-01-21 19:35 ` Romain Perier
@ 2022-01-21 19:35 ` Romain Perier
-1 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel
infinity2m are running up to 1.2Ghz, this extends opp_table with the
corresponding frequencies and enable operating-points table for cpu1
Signed-off-by: Romain Perier <romain.perier@gmail.com>
---
arch/arm/boot/dts/mstar-infinity2m.dtsi | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/arch/arm/boot/dts/mstar-infinity2m.dtsi b/arch/arm/boot/dts/mstar-infinity2m.dtsi
index dc339cd29778..1b485efd7156 100644
--- a/arch/arm/boot/dts/mstar-infinity2m.dtsi
+++ b/arch/arm/boot/dts/mstar-infinity2m.dtsi
@@ -6,10 +6,25 @@
#include "mstar-infinity.dtsi"
+&cpu0_opp_table {
+ opp-1000000000 {
+ opp-hz = /bits/ 64 <1000000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ };
+
+ opp-1200000000 {
+ opp-hz = /bits/ 64 <1200000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ };
+};
+
&cpus {
cpu1: cpu@1 {
device_type = "cpu";
compatible = "arm,cortex-a7";
+ operating-points-v2 = <&cpu0_opp_table>;
reg = <0x1>;
clocks = <&cpupll>;
clock-names = "cpuclk";
--
2.34.1
^ permalink raw reply related [flat|nested] 24+ messages in thread* [PATCH v3 9/9] ARM: mstar: Extend opp_table for infinity2m
@ 2022-01-21 19:35 ` Romain Perier
0 siblings, 0 replies; 24+ messages in thread
From: Romain Perier @ 2022-01-21 19:35 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, linux-clk, Arnd Bergmann,
Daniel Palmer, Romain Perier, Rob Herring
Cc: devicetree, linux-arm-kernel, linux-kernel
infinity2m are running up to 1.2Ghz, this extends opp_table with the
corresponding frequencies and enable operating-points table for cpu1
Signed-off-by: Romain Perier <romain.perier@gmail.com>
---
arch/arm/boot/dts/mstar-infinity2m.dtsi | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/arch/arm/boot/dts/mstar-infinity2m.dtsi b/arch/arm/boot/dts/mstar-infinity2m.dtsi
index dc339cd29778..1b485efd7156 100644
--- a/arch/arm/boot/dts/mstar-infinity2m.dtsi
+++ b/arch/arm/boot/dts/mstar-infinity2m.dtsi
@@ -6,10 +6,25 @@
#include "mstar-infinity.dtsi"
+&cpu0_opp_table {
+ opp-1000000000 {
+ opp-hz = /bits/ 64 <1000000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ };
+
+ opp-1200000000 {
+ opp-hz = /bits/ 64 <1200000000>;
+ opp-microvolt = <1000000>;
+ clock-latency-ns = <300000>;
+ };
+};
+
&cpus {
cpu1: cpu@1 {
device_type = "cpu";
compatible = "arm,cortex-a7";
+ operating-points-v2 = <&cpu0_opp_table>;
reg = <0x1>;
clocks = <&cpupll>;
clock-names = "cpuclk";
--
2.34.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 24+ messages in thread